Enable/Disable button according Items count in XAML

[ENTERPRISE INTERNATIONAL SAS]

Hi!


I would like to know how to enable a button when items.count > 0 and disable it when items.count == 0 but into XAML using binding. I did this:

<Button x:Name="btnAceptar" Content="Aceptar" Command="{Binding GrabarCommand}" IsEnabled="{Binding ElementName=grdGrid, Path=Items.Count, Converter={StaticResource ConvertidorHabilitacionItemsGrid}, Mode=OneWay}" >

converter is:

public class ConvertidorHabilitacionItemsGrid : IValueConverter
 {
     public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
     {
         return !((int)value == 0);
     }

     public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
     {
         throw new NotImplementedException();
     }
 }

But it not works

thanks

[Maya]

Hello Ramiro,

May I suggest you yet another approach ? You may use the ObservableItemCollection for the source of the grid and handle its CollectionChanged event. Once the count of the items is equal to zero, you may disable the corresponding button. I am sending you a sample project illustrating this approach. Let me know whether it suits your needs.  
 

Best wishes,
Maya
the Telerik team